pose position to reset position?
Are you sure that you reset the rotation in the pose mode? Because i assume you reset the rotation for the armature rotation as object in object mode, while you are supposed to reset every bone rotation inside the pose mode. 

If this is the case, enter pose mode for your armature, select all bone by pressing "A" shortcut, then reset the rotation by pressing "alt-R", and press "alt-G" to reset location if necessary